Chapter 28 Mid-term Review

Classification and Arthropods

List the 7 Taxa in descending order

• Kingdom• Phylum• Class• Order• Family • Genus• Species

Why is it necessary to have a system of classification for living

things?

• It makes it easier to study them because we can use general descriptions to understand characteristics of organisms in the same group

List as many general characteristics of arthropods as you can recall.

• Chitinous exoskeleton• Segmented bodies• Jointed appendages• Open circulatory systems• Ventral nerve cord• Well-developed senses

List the 4 Classes of Arthropods

• Arachnida• Crustacea• Myriapods• Insecta

General Description of Arachnids

• 2 main body segments – cephalothorax and abdomen

• Lack antennae, have pedipalps• Lack mandibles, have chelicerae• Use book lungs to breathe• Includes spiders and scorpions

General Description of Crustaceans

• 2 main body segments• Exoskeletons contain calcium carbonate and

chitin• Usually aquatic; breathe using gills• 2 pairs of antenna• Includes crayfish, crabs, and shrimp

General Description of Myriapods

• Have lots of segments• Use tracheal tubes to breathe• Includes centipedes and millipedes

General Description of Insects

• 3 Main body segments – head, thorax, and abdomen

• One pair of antenna• Breathe with tracheal tubes• Very diverse; includes ants, flies, and beetles

What are the two types of metamorphosis?

• Complete and incomplete

List the 3 stages of incomplete metamorphosis

• Egg• Nymph• Adult

List the 4 stages of complete metamorphosis

• Egg• Larvae• Pupa• Adult

Vocabulary

• Molting • Simple eye• Compound eye• Antenna• Pedipalps• Book lungs• Tracheal tubes

Vocabulary• Molting – replaces the old exoskeleton • Simple eye – eye with only one lens• Compound eye – eye with many lenses• Antenna – sensory structure responsible for

touch, taste, smell, and hearing• Pedipalps – arachnid appendage that’s like an

antenna and also holds food• Book lungs – respiratory structure of arachnids• Tracheal tubes – respiratory structure of insects